package android.mcsmtms.activity;

import android.animation.Animator;
import android.animation.AnimatorListenerAdapter;
import android.annotation.TargetApi;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.mcsmtms.R;
import android.mcsmtms.constant.GlobalConstants;
import android.mcsmtms.constant.GlobalProperties;
import android.mcsmtms.domain.User;
import android.mcsmtms.rest.RestClient;
import android.mcsmtms.util.JsonHelper;
import android.os.AsyncTask;
import android.os.Build;
import android.os.Bundle;
import android.text.TextUtils;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.View;
import android.view.Window;
import android.view.inputmethod.EditorInfo;
import android.view.inputmethod.InputMethodManager;
import android.widget.EditText;
import android.widget.TextView;

/**
 * Activity which displays a login screen to the user, offering registration as
 * well.
 */
public class LoginActivity extends Activity {
	/**
	 * A dummy authentication store containing known user names and passwords.
	 * TODO: remove after connecting to a real authentication system.
	 */
	private static final String[] DUMMY_CREDENTIALS = new String[] {
			"rix:1", "mmda:1", "scout:1" };
	
	//private static final String LOGIN_URL = "http://mcsmtms.appspot.com/rest/users/";
	private static final String LOGIN_URL = GlobalConstants.RestUrls.LOGIN_URL;

	/**
	 * The default email to populate the email field with.
	 */
	public static final String EXTRA_EMAIL = "com.example.android.authenticatordemo.extra.EMAIL";
	
	public String authToken;
	public User loggedUser;

	/**
	 * Keep track of the login task to ensure we can cancel it if requested.
	 */
	private UserLoginTask mAuthTask = null;

	// Values for username and password at the time of the login attempt.
	private String mUsername;
	private String mPassword;

	// UI references.
	private EditText mUsernamelView;
	private EditText mPasswordView;
	private View mLoginFormView;
	private View mLoginStatusView;
	private TextView mLoginStatusMessageView;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);

		this.requestWindowFeature(Window.FEATURE_NO_TITLE);
		setContentView(R.layout.activity_login);

		// Set up the login form.
		mUsername = "";
		mUsernamelView = (EditText) findViewById(R.id.username);
		mUsernamelView.setText(mUsername);

		mPasswordView = (EditText) findViewById(R.id.password);
		mPasswordView
				.setOnEditorActionListener(new TextView.OnEditorActionListener() {
					@Override
					public boolean onEditorAction(TextView textView, int id,
							KeyEvent keyEvent) {
						if (id == R.id.login || id == EditorInfo.IME_NULL) {
							attemptLogin();
							return true;
						}
						return false;
					}
				});

		mLoginFormView = findViewById(R.id.login_form);
		mLoginStatusView = findViewById(R.id.login_status);
		mLoginStatusMessageView = (TextView) findViewById(R.id.login_status_message);

		mUsernamelView.setText("kim");
		mPasswordView.setText("1");
		
		findViewById(R.id.sign_in_button).setOnClickListener(
				new View.OnClickListener() {
					@Override
					public void onClick(View view) {
						attemptLogin();
					}
				});
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		super.onCreateOptionsMenu(menu);
		getMenuInflater().inflate(R.menu.login, menu);
		return true;
	}

	/**
	 * Attempts to sign in or register the account specified by the login form.
	 * If there are form errors (invalid username, missing fields, etc.), the
	 * errors are presented and no actual login attempt is made.
	 */
	public void attemptLogin() {
		if (mAuthTask != null) {
			return;
		}

		// Reset errors.
		mUsernamelView.setError(null);
		mPasswordView.setError(null);

		// Store values at the time of the login attempt.
		mUsername = mUsernamelView.getText().toString();
		mPassword = mPasswordView.getText().toString();

		boolean cancel = false;
		View focusView = null;

		// Check for a valid password.
		if (TextUtils.isEmpty(mPassword)) {
			mPasswordView.setError(getString(R.string.error_field_required));
			focusView = mPasswordView;
			cancel = true;
		} else if (mPassword.length() < 1) {
			mPasswordView.setError(getString(R.string.error_invalid_password));
			focusView = mPasswordView;
			cancel = true;
		}

		// Check for a valid username.
		if (TextUtils.isEmpty(mUsername)) {
			mUsernamelView.setError(getString(R.string.error_field_required));
			focusView = mUsernamelView;
			cancel = true;
		} 
//		else if (!mEmail.contains("@")) {
//s			mEmailView.setError(getString(R.string.error_invalid_email));
//			focusView = mEmailView;
//			cancel = true;
//		}

		if (cancel) {
			// There was an error; don't attempt login and focus the first
			// form field with an error.
			focusView.requestFocus();
		} else {
			// Show a progress spinner, and kick off a background task to
			// perform the user login attempt.
			mLoginStatusMessageView.setText(R.string.login_progress_signing_in);
			showProgress(true);
			mAuthTask = new UserLoginTask();
			mAuthTask.execute((Void) null);
		}
	}

	/**
	 * Shows the progress UI and hides the login form.
	 */
	@TargetApi(Build.VERSION_CODES.HONEYCOMB_MR2)
	private void showProgress(final boolean show) {
		// On Honeycomb MR2 we have the ViewPropertyAnimator APIs, which allow
		// for very easy animations. If available, use these APIs to fade-in
		// the progress spinner.
		if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB_MR2) {
			int shortAnimTime = getResources().getInteger(
					android.R.integer.config_shortAnimTime);

			mLoginStatusView.setVisibility(View.VISIBLE);
			mLoginStatusView.animate().setDuration(shortAnimTime)
					.alpha(show ? 1 : 0)
					.setListener(new AnimatorListenerAdapter() {
						@Override
						public void onAnimationEnd(Animator animation) {
							mLoginStatusView.setVisibility(show ? View.VISIBLE
									: View.GONE);
						}
					});

			mLoginFormView.setVisibility(View.VISIBLE);
			mLoginFormView.animate().setDuration(shortAnimTime)
					.alpha(show ? 0 : 1)
					.setListener(new AnimatorListenerAdapter() {
						@Override
						public void onAnimationEnd(Animator animation) {
							mLoginFormView.setVisibility(show ? View.GONE
									: View.VISIBLE);
						}
					});
		} else {
			// The ViewPropertyAnimator APIs are not available, so simply show
			// and hide the relevant UI components.
			mLoginStatusView.setVisibility(show ? View.VISIBLE : View.GONE);
			mLoginFormView.setVisibility(show ? View.GONE : View.VISIBLE);
		}
	}

	/**
	 * Represents an asynchronous login/registration task used to authenticate
	 * the user.
	 */
	public class UserLoginTask extends AsyncTask<Void, Void, Boolean> {
		@Override
		protected Boolean doInBackground(Void... params) {
			// TODO: attempt authentication against a network service.
			
			try {
				// Simulate network access.
				//Thread.sleep(2000);
				RestClient client = new RestClient(LOGIN_URL + mUsername, mUsername, mPassword);
				
				try {
				    client.execute(RestClient.RequestMethod.GET);
				} catch (Exception e) {
				    e.printStackTrace();
				}

				String response = client.getResponse();
				
//				Gson gson = new Gson();
//		        JsonElement jElement = new JsonParser().parse(response);
//		        JsonObject jObject = jElement.getAsJsonObject();
		        loggedUser = JsonHelper.getObject(response, User.class, "user");
		        //loggedUser = (User) userObject;
		        if(loggedUser != null) 
		        	System.out.println(loggedUser.getUserName());
		        //gson.fromJson(jObject.get("user"), new TypeToken<User>(){}.getType());
			} catch (Exception e) {
				return false;
			}

			if(loggedUser != null && loggedUser.getPassword().equals(mPassword)) {
				((GlobalProperties) getApplication()).setLoggedUser(loggedUser);
				return true;
			}
			
			// TODO: register the new account here.
			return false;
		}

		@Override
		protected void onPostExecute(final Boolean success) {
			mAuthTask = null;
			showProgress(false);

			if (success) {
				InputMethodManager imm = (InputMethodManager)getSystemService(
					      Context.INPUT_METHOD_SERVICE);
				imm.hideSoftInputFromWindow(mPasswordView.getApplicationWindowToken(), 0);
				
				Intent goToMcsmtmsActivityIntent = new Intent(LoginActivity.this, McsmtmsActivity.class); 
		    	//McsmtmsActivity.this.startActivity(monitorSpeedIntent);
				LoginActivity.this.startActivity(goToMcsmtmsActivityIntent);
			} else {
				mPasswordView
						.setError(getString(R.string.error_incorrect_password));
				mPasswordView.requestFocus();
			}
		}

		@Override
		protected void onCancelled() {
			mAuthTask = null;
			showProgress(false);
		}
	}
}
